{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["material", "biomedical", "manufacturing process", "process parameter", "concept or principle", "engineering feature"], "input": "Addition of about 2 % silicon to the copper-aluminum alloy helps to increase the hardness by 0.5–1 times ."}
{"material": ["silicon", "alloy"], "biomedical": [], "manufacturing process": [], "process parameter": [], "concept or principle": [], "engineering feature": []}